CN112538664B - Anti-counterfeiting bamboo pulp fiber, preparation method and anti-counterfeiting method - Google Patents
Anti-counterfeiting bamboo pulp fiber, preparation method and anti-counterfeiting method Download PDFInfo
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- CN112538664B CN112538664B CN202011254934.XA CN202011254934A CN112538664B CN 112538664 B CN112538664 B CN 112538664B CN 202011254934 A CN202011254934 A CN 202011254934A CN 112538664 B CN112538664 B CN 112538664B
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- bamboo pulp
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- 239000000835 fiber Substances 0.000 title claims abstract description 101
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- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims description 29
- 229910052751 metal Inorganic materials 0.000 claims abstract description 57
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- 238000012360 testing method Methods 0.000 claims description 8
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- IAZSXUOKBPGUMV-UHFFFAOYSA-N 1-butyl-3-methyl-1,2-dihydroimidazol-1-ium;chloride Chemical compound [Cl-].CCCC[NH+]1CN(C)C=C1 IAZSXUOKBPGUMV-UHFFFAOYSA-N 0.000 claims description 2
- ZXLOSLWIGFGPIU-UHFFFAOYSA-N 1-ethyl-3-methyl-1,2-dihydroimidazol-1-ium;acetate Chemical compound CC(O)=O.CCN1CN(C)C=C1 ZXLOSLWIGFGPIU-UHFFFAOYSA-N 0.000 claims description 2
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- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
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- JEGNXMUWVCVSSQ-ISLYRVAYSA-N (e)-octadec-1-en-1-ol Chemical compound CCCCCCCCCCCCCCCC\C=C\O JEGNXMUWVCVSSQ-ISLYRVAYSA-N 0.000 description 5
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 5
- XMLQWXUVTXCDDL-UHFFFAOYSA-N oleyl alcohol Natural products CCCCCCC=CCCCCCCCCCCO XMLQWXUVTXCDDL-UHFFFAOYSA-N 0.000 description 5
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- FFEARJCKVFRZRR-BYPYZUCNSA-N L-methionine Chemical compound CSCC[C@H](N)C(O)=O FFEARJCKVFRZRR-BYPYZUCNSA-N 0.000 description 4
- 241001465754 Metazoa Species 0.000 description 4
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- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 3
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- NJMWOUFKYKNWDW-UHFFFAOYSA-N 1-ethyl-3-methylimidazolium Chemical compound CCN1C=C[N+](C)=C1 NJMWOUFKYKNWDW-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 239000004471 Glycine Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
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- 238000009736 wetting Methods 0.000 description 2
- FHDQNOXQSTVAIC-UHFFFAOYSA-M 1-butyl-3-methylimidazol-3-ium;chloride Chemical compound [Cl-].CCCCN1C=C[N+](C)=C1 FHDQNOXQSTVAIC-UHFFFAOYSA-M 0.000 description 1
- IBZJNLWLRUHZIX-UHFFFAOYSA-N 1-ethyl-3-methyl-2h-imidazole Chemical compound CCN1CN(C)C=C1 IBZJNLWLRUHZIX-UHFFFAOYSA-N 0.000 description 1
- 208000035240 Disease Resistance Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 description 1
- 108010009736 Protein Hydrolysates Proteins 0.000 description 1
- 230000003113 alkalizing effect Effects 0.000 description 1
- 239000003674 animal food additive Substances 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 235000003704 aspartic acid Nutrition 0.000 description 1
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- -1 calcium tryptophan amino acid Chemical class 0.000 description 1
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- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
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- UOXSXMSTSYWNMH-UHFFFAOYSA-L zinc;2-aminoacetate Chemical compound [Zn+2].NCC([O-])=O.NCC([O-])=O UOXSXMSTSYWNMH-UHFFFAOYSA-L 0.000 description 1
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-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
- D01F2/08—Composition of the spinning solution or the bath
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B9/00—Cellulose xanthate; Viscose
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/73—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using plasma burners or torches
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/447—Systems using electrophoresis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
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- Health & Medical Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Analytical Chemistry (AREA)
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- Engineering & Computer Science (AREA)
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- Plasma & Fusion (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Polymers & Plastics (AREA)
- Paper (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention relates to a preparation method of anti-counterfeiting bamboo pulp fiber, which comprises the following steps: soaking the crushed bamboo pulp in an alkali solution, then performing alkalization treatment and sulfonation treatment, mixing the bamboo pulp with an ionic liquid, dissolving the bamboo pulp in the alkali solution, filtering the mixture, and aging the mixture to obtain a spinning viscose; uniformly mixing the spinning viscose with at least one amino acid metal chelate and a dispersing agent to obtain a spinning solution; then, spinning the spinning solution, immersing the spinning solution into an acid bath for solidification forming, and obtaining the anti-counterfeiting bamboo pulp fiber after the steps of drafting, cutting, washing, desulfurizing, bleaching, oiling, dehydrating and drying; wherein the total amount of the amino acid metal chelate accounts for 0.1-1 per mill of the mass fraction of the bamboo pulp. The anti-counterfeiting bamboo pulp fiber of the invention utilizes amino acid metal chelate as an anti-counterfeiting tracer, carries out anti-counterfeiting encryption treatment on the bamboo pulp fiber, and carries out anti-counterfeiting identification through detection and encoding of metal elements and amino acid types.
Description
Technical Field
The invention relates to an anti-counterfeiting fiber, in particular to an anti-counterfeiting bamboo pulp fiber, a preparation method and an anti-counterfeiting method.
Background
At present, the anti-counterfeiting fiber mainly takes chemical fiber as a main material, and the anti-counterfeiting identification is mostly carried out through the color of the fiber, so that the source of the anti-counterfeiting fiber cannot be tracked. For example, chinese invention CN1763311A discloses a composite anti-counterfeit fiber, which comprises an inner layer and an outer layer, wherein the inner layer is amorphous alloy fiber, the outer layer is a luminescent material layer, and the outer layer is coated, dyed, adhered and coated on the amorphous alloy fiber of the inner layer. The anti-counterfeiting fiber has the electromagnetic property of the amorphous alloy fiber and also has optical luminescence property. The electromagnetic property of the material can be used for detecting authenticity by an instrument; the optical luminescence property can be used for the public to identify the authenticity. For another example, chinese invention CN107475853A discloses a method for preparing an anti-counterfeit fiber, which is performed sequentially according to the following steps: weaving single or multi-strand base fibers and water-soluble or hot-melt fibers into a filter screen, wherein the filter screen takes the base fibers as warp yarns and the water-soluble or hot-melt fibers as weft yarns, or takes the base fibers as weft yarns and the water-soluble or hot-melt fibers as warp yarns; and then, the filter screen passes through a heating channel and is cut, so that the controllable coding of the monofilament color is realized. The anti-counterfeiting method of the fiber is mainly an anti-counterfeiting method for adding color to the fiber, namely, the color is added through processes of coating and dyeing and the like to a part of the fiber in the production process of the fiber, so that the fiber has anti-counterfeiting characteristic. However, the preparation method of the anti-counterfeiting fiber has the disadvantages of long process, excessive energy consumption, no tracking and great negative influence on the service performance of the fiber.
At present, the development of amino acid metal chelates is applied to the field of animal feed and plant fertilizers, for example, calcium amino acid chelate in Chinese patent CN108244346A is used as a biological feed additive for livestock and poultry and is added into biological feed for livestock and poultry to strengthen the synthesis of animal antibiotics, improve the disease resistance of animals and promote the growth of animals. However, the use of amino acid metal chelates in the preparation of anti-counterfeiting materials is not disclosed in the prior art.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an anti-counterfeiting bamboo pulp fiber, a preparation method and an anti-counterfeiting method.
The first purpose of the invention is to disclose the application of amino acid metal chelate as anti-counterfeiting tracing agent of anti-counterfeiting bamboo pulp fiber.
The application refers to that in the preparation process of the bamboo pulp fiber, the amino acid metal chelate is added as an anti-counterfeiting tracking agent to prepare the anti-counterfeiting bamboo pulp fiber.
The second purpose of the invention is to provide a preparation method of anti-counterfeiting bamboo pulp fiber, which comprises the following steps:
(1) soaking the crushed bamboo pulp in an alkali solution, then performing alkalization treatment and sulfonation treatment, mixing the bamboo pulp with an ionic liquid, dissolving the bamboo pulp in the alkali solution, filtering the mixture, and aging the mixture to obtain a spinning viscose;
(2) uniformly mixing the spinning viscose with at least one amino acid metal chelate and a dispersing agent to obtain a spinning solution; then, spinning the spinning solution, immersing the spinning solution into an acid bath for solidification forming, and obtaining the anti-counterfeiting bamboo pulp fiber after the steps of drafting, cutting, washing, desulfurizing, bleaching, oiling, dehydrating and drying; wherein, each amino acid metal chelate accounts for 0.1-1 per mill of the mass fraction of the bamboo pulp.
Further, in the step (1), the impregnation adopts a secondary impregnation process, wherein the primary impregnation adopts 230-235g/L NaOH, the impregnation temperature is 45-55 ℃, the secondary impregnation adopts 195-200g/L NaOH, and the impregnation temperature is 45-55 ℃.
Further, in the step (1), when the substrate is immersed in the alkali solution, the immersion bath ratio is 1: 20.
further, in the step (1), when the bamboo pulp is immersed in the alkali solution, BerolVisco388 (CAS number 55353-28-1, Acksonobel, Sweden) is added into the alkali solution in an amount of 0.1-0.2% of the weight of the alpha fibers in the bamboo pulp.
Further, in the step (1), the degree of polymerization of the bamboo pulp is 500-600, and the cellulose content is 90%.
Further, in the step (1), the mass fraction of the methyl fiber of the spinning viscose is 27-30%, and the alkali content is 15-18 wt%.
Further, using CS2By sulfonation of CS2The addition amount is in the bamboo pulp30-35% of the mass of the alpha-cellulose.
Further, in the step (1), the ionic liquid comprises one or more of 1-ethyl-3-methylimidazole acetate ([ EMIM ] Ac), 1-allyl-3-methylimidazole bromide ([ AMIM ] Br) and 1-butyl-3-methylimidazole chloride ([ BMIM ] Cl).
Further, in the step (1), after mixing with the ionic liquid, carrying out two dissolving and two filtering processes, wherein one dissolving time is 3 hours, and the dissolving temperature is 55-60 ℃; the second dissolving time is 5h, and the dissolving temperature is 60-65 ℃.
Further, in the step (1), the aging time is 110-.
Further, in the step (2), the spinning viscose is uniformly mixed with at least one amino acid metal chelate and a dispersing agent by adopting an ultrasonic vibration method, and the ultrasonic time is 120 min.
Further, in the step (2), the amino acid metal chelate includes one or more of calcium tryptophan, copper glycinate, manganese methionine and iron glutamate. Preferably, the amino acid metal chelate is two of the above chelates.
Further, in the step (2), the dispersant is an anionic, nonionic or polymeric surfactant.
Further, in the step (2), the acid bath comprises 85g/L-130g/L of sulfuric acid and 240g/L-340g/L of sodium sulfate, and the bath temperature is 45-60 ℃.
Further, in the step (2), the washing temperature is 60 to 65 ℃.
The third purpose of the invention is to provide the anti-counterfeiting bamboo pulp fiber prepared by the preparation method, which comprises the bamboo pulp fiber and at least one amino acid metal chelate distributed in the bamboo pulp fiber.
The anti-counterfeiting bamboo pulp fiber takes the amino acid metal chelate as the anti-counterfeiting tracer, and is green and safe, so that the processing process is more green and safe; meanwhile, the whole anti-counterfeiting processing process is simple. The total addition amount of the amino acid metal chelate is 0.1-1 per mill of the mass fraction of the bamboo pulp, and the amino acid metal chelate is uniformly mixed without negative influence on the physicochemical property and the appearance of the fiber.
The fourth purpose of the invention is to provide an anti-counterfeiting method of the anti-counterfeiting bamboo pulp fiber, which is characterized by comprising the following steps of encryption, decryption and authentication:
the encryption step comprises: according to the type and the dosage of the amino acid metal chelate, the anti-counterfeiting bamboo pulp fiber is coded to send out encryption information;
the decryption and authentication steps comprise: obtaining encrypted information, and testing the types and the use amounts of amino acid and metal ions in the bamboo pulp fiber; then comparing with the obtained encrypted information to identify the authenticity of the bamboo pulp fiber.
Furthermore, the type and content of the amino acid are measured by adopting a capillary electrophoresis/mass spectrometry combined technology, and the type and content of the metal element are detected by adopting an inductively coupled plasma spectrometry.
By the scheme, the invention at least has the following advantages:
the invention discloses an anti-counterfeiting bamboo pulp fiber and a preparation method thereof, wherein an amino acid metal chelate is used as an anti-counterfeiting tracer to perform anti-counterfeiting encryption on the bamboo pulp fiber, the anti-counterfeiting tracer is added in the preparation process of the bamboo pulp fiber, the preparation method has simple and convenient process and low energy consumption, the bamboo pulp fiber containing specific metal elements and specific amino acid types is obtained, the fiber sources can be tracked and identified by detecting the metal elements and the amino acid types, the types are numbered by letters or numbers, a unique block password is formed, and the anti-counterfeiting concealment is good.
The invention utilizes the types and the contents of metal elements and amino acids as the anti-counterfeiting marks, the content of amino acid metal chelates added into the anti-counterfeiting bamboo pulp fiber is very low, and the anti-counterfeiting marks are arranged in the fiber, thereby not affecting the whole fiber performance of the bamboo pulp fiber; the amino acid metal chelate of the anti-counterfeiting mark of the anti-counterfeiting bamboo pulp fiber can be uniformly distributed in the fiber, is easy to detect and identify, has long time effect, effective encryption and traceability, can track the fiber source according to the anti-counterfeiting code, and has high anti-counterfeiting strength; the amino acid metal chelate of the anti-counterfeiting mark is only added after the filtration process before spinning, so that the complexity and the processing cost of the preparation process of the bamboo pulp fiber are not increased, and the anti-counterfeiting mark has good market application prospect.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following description is made with reference to the preferred embodiments of the present invention and the accompanying detailed drawings.
Drawings
Fig. 1 is a process diagram of a preparation method of anti-counterfeiting bamboo pulp fiber.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the following examples of the invention, the test and evaluation methods were as follows:
firstly, metal element determination:
(1) 1g of anti-counterfeiting bamboo pulp fiber is taken to be placed in a test tube, deionized water is added at normal temperature and normal pressure for wetting for 20min, and then the mixture is added into a test tube filled with 20mL of concentrated nitric acid;
(2) placing the test tube obtained in the step (1) in a digestion instrument for digestion for 4 hours until concentrated nitric acid is evaporated to dryness, then adding sufficient nitric acid with the concentration of 0.3% for dissolution, filtering, and performing constant volume by using nitric acid with the concentration of 0.3% to prepare a constant volume solution;
(3) and (3) carrying out quantitative analysis on the constant volume solution prepared in the step (2) by adopting an inductively coupled plasma spectrometer.
Secondly, measuring the mechanical property and morphological parameters of the fiber:
the measurement of the mechanical property and morphological parameters of the fiber is the conventional experimental condition and method.
Thirdly, amino acid determination:
20g of anti-counterfeiting bamboo pulp fiber is placed in a test tube, deionized water is added at normal temperature and normal pressure for wetting for 20min, and then the test tube is placed in a hydrolysis tube.
Adding 30-35 mL of 6mol/L hydrochloric acid into a hydrolysis tube, adding 3-4 drops of newly distilled phenol, putting the hydrolysis tube into a refrigerant, freezing for 3-5 min, connecting to an exhaust tube of a vacuum pump, vacuumizing (approximately 0psi), and filling high-purity nitrogen; vacuumizing and filling nitrogen again, repeating the steps for three times, sealing the opening in the nitrogen filling state or screwing a screw cap, putting the sealed hydrolysis tube into a constant-temperature drying oven at the temperature of 110 +/-1 ℃, hydrolyzing for 22h, taking out and cooling. And opening the hydrolysis tube, filtering the hydrolysate, washing the hydrolysis tube with deionized water for multiple times, transferring all the hydrolysate into a 50ml volumetric flask, and fixing the volume with the deionized water. Sucking 1ml of filtrate into a 5ml volumetric flask, drying at 40-50 ℃ by using a vacuum dryer, dissolving residues in 1-2 ml of water, drying again, repeating the drying for two times, evaporating to dryness, and dissolving with 1ml of buffer solution with the pH value of 2.2 for measurement by an instrument.
Accurately sucking 0.200ml of mixed amino acid standard solution, diluting to 5ml with buffer solution with pH2.2, wherein the standard dilution concentration is 5.00nmol/50 μ L, and determining amino acid content of sample determination solution by external standard method with amino acid automatic analyzer as amino acid standard reagent for determination on machine.
Fourthly, anti-counterfeiting reliability and detection difficulty:
in the following examples, the anti-counterfeiting reliability and the detection difficulty are evaluated and classified into reliable and unreliable respectively; easy, general and tedious.
In the following, all starting materials are essentially obtained commercially or prepared by conventional methods in the art, unless otherwise specified. Among them, bamboo pulp was purchased from Toyobo pulp Co., Ltd, Sanyou group in Tang mountain, and had a polymerization degree of 500 and a cellulose content of about 90%. BerolVisco388 is available from Aksunobell, Sweden, CAS No. 55353-28-1, dispersant octadecenol polyoxyethylene ether from Heian petrochemical plant, CAS No. 5353-27-5, manganese methionine is available from Georgia, Technoda Biotech group, Cat No. M604-14(2:1), copper glycinate is available from Ningbo encyclopedia, Cat No. 6633, and iron aspartate is available from Henan Qianjin.
Example 1
The embodiment provides a preparation method of anti-counterfeiting bamboo pulp fiber, which comprises the following specific steps:
(1) crushing raw bamboo pulp by a crusher, adding NaOH solution for twice impregnation, wherein the impregnation bath ratio is 1: 20, wherein the first impregnation adopts NaOH aqueous solution with the concentration of 230g/L and the alkali temperature of 45 ℃, and the second impregnation adopts NaOH aqueous solution with the concentration of 195/L and the alkaliThe temperature was 55 ℃. When the bamboo pulp is immersed in the alkali solution, BerolVisco388 which is produced by Acksolberg company is also added into the alkali solution, and the adding amount is 0.1 percent of the weight of the alpha fiber in the bamboo pulp. Then alkalizing and sulfonating to prepare cellulose xanthate, and adding ionic liquid 1-ethyl-3-methylimidazole acetate ([ EMIM ]]Ac) is subjected to two dissolving and two filtering processes, and then is ripened to prepare the spinning viscose. Specifically, CS accounting for 35 percent of the mass of the first fiber is added in the sulfonation procedure2. The primary dissolving time is 3 hours, and the dissolving temperature is 55 ℃; the second dissolution time is 5h, and the dissolution temperature is 60 ℃. The mass ratio of the addition amount of the ionic liquid to the bamboo pulp is 8: 2.
(2) filtering before spinning, adding anti-counterfeiting tracing metal amino acid chelate manganese methionine, wherein the manganese methionine is 1 per mill of the mass fraction of the bamboo pulp, adding octadecenol polyoxyethylene ether dispersing agent, the mass fraction of the dispersing agent is 5 percent of the bamboo pulp, ultrasonically vibrating, and uniformly stirring to obtain the spinning solution. The ultrasonic resonance time is 120min, and the operation program is on for 1s and off for 2 s.
(3) The spinning solution enters into an acid bath through a spinning nozzle for solidification and forming, and the anti-counterfeiting bamboo pulp fiber is prepared through drawing, cutting, washing, desulfurizing, bleaching, oiling, dehydrating and drying. Wherein the indexes of the acid bath are as follows: the sulfuric acid content is 85g/L, the sodium sulfate content is 240g/L, and the bath temperature is 50 ℃; the water washing temperature was 60 ℃.
The prepared anti-counterfeiting bamboo pulp fiber has the fineness of 6.0dtex and the strength of 3.48 CN/dtex; detecting that the content of the manganese metal is 0.00098g, and detecting methionine; anti-counterfeiting reliability: unreliable; and (3) detection difficulty: it is easy.
Example 2
The embodiment provides a preparation method of anti-counterfeiting bamboo pulp fiber, which comprises the following specific steps:
(1) same as in step (1) of example 1.
(2) Filtering before spinning, adding anti-counterfeiting tracing metal amino acid chelate manganese methionine, copper glycinate and octadecenol polyoxyethylene ether dispersing agent, wherein the mass fraction of the dispersing agent is 5% of the bamboo pulp, the mass ratio of manganese methionine to copper glycinate is 1:3, and the total mass of the two metal amino acid chelates is 1 per mill of the mass fraction of the bamboo pulp. And vibrating by ultrasonic waves, and stirring uniformly to obtain the spinning solution.
(3) Same as in step (3) of example 1.
The fineness of the prepared bamboo pulp fiber is 6.0dtex, and the strength is 3.48 CN/dtex; detecting that the content of the metal manganese is 0.00022g, the content of the metal copper is 0.00074g, the mass ratio of the metal manganese to the metal copper is about 1:3, and detecting methionine and glycine; anti-counterfeiting reliability: reliability; and (3) detection difficulty: generally.
Example 3
The embodiment provides a preparation method of anti-counterfeiting bamboo pulp fiber, which comprises the following specific steps;
(1) same as in step (1) of example 1.
(2) Filtering before spinning, adding anti-counterfeiting tracing metal amino acid chelate manganese methionine, copper glycine, iron aspartate and octadecenol polyoxyethylene ether dispersing agent, wherein the mass fraction of the dispersing agent is 5% of the bamboo pulp, the mass ratio of the manganese methionine, the copper glycine and the iron aspartate is 1:3:6, and the total mass of the three metal amino acid chelates is 1 per mill of the mass fraction of the bamboo pulp. And vibrating by ultrasonic waves, and stirring uniformly to obtain the spinning solution.
(3) Same as in step (3) of example 1.
The fineness of the prepared bamboo pulp fiber is 6.0dtex, and the strength is 3.50 CN/dtex; detecting that the content of manganese metal is 0.00009g, the content of copper metal is 0.00028g, the content of iron metal is 0.00056g, the mass ratio of calcium metal to copper metal to iron metal is about 1:3:6, and detecting methionine, glycine and aspartic acid; anti-counterfeiting reliability: reliability; and (3) detection difficulty: it is cumbersome.
Comparative example 1
The embodiment provides a preparation method of a conventional bamboo pulp fiber, which comprises the following specific steps;
(1) same as in step (1) of example 1.
(2) Filtering before spinning, adding octadecenol polyoxyethylene ether dispersing agent with the mass fraction of 5 percent of that of the bamboo pulp, ultrasonically vibrating, and uniformly stirring to obtain the spinning solution.
(3) Same as in step (3) of example 1.
The fineness of the prepared bamboo pulp fiber is 6.0dtex, and the strength is 3.49 CN/dtex.
The fiber property comparison ratios of the above examples and comparative examples are shown in table 1, and it can be seen that the strength and fineness of the fiber are not affected by the addition of the metal amino acid chelate in the fiber preparation process, compared to the conventional bamboo pulp fiber. The mechanical property and the appearance form of the anti-counterfeiting bamboo pulp fiber are not obviously reduced.
TABLE 1 comparison of the Properties of different fibers
The comparison of the examples 1, 2 and 3 shows that the added amino acid metal chelate is easy to detect, the anti-counterfeiting is too simple, and the anti-counterfeiting reliability is lower; the anti-counterfeiting reliability of adding three amino acid metal chelates is high, but the detection is too complicated, and the simplest and most effective processing is that two amino acid metal chelates are added. Compared with comparative example 1, the performance of the anti-counterfeiting fiber added with the amino acid metal chelate is not obviously changed.
The invention applies the block chain thinking to the anti-counterfeiting of the textile, and the anti-counterfeiting method of the invention is described by taking the embodiment 2 as an example.
Before the anti-counterfeiting bamboo pulp fiber is prepared, according to the formula design, firstly numbering a manganese element as M and numbering a metal copper element as C; methionine number is d, glycine number is g. Numbering according to the content of the substances. The simplest mass ratio of the metal manganese to the metal copper is 1:3, and the metal manganese and the metal copper are numbered from large to small in proportion; amino acid content testing is tedious and unnumbered. The code of the bamboo pulp fiber added with the calcium tryptophan amino acid and the copper glycine in the mass ratio of 1:3 is CMgd 31.
A sample of bamboo pulp fiber was produced exactly as in example 2, and the user obtained the design code of the bamboo pulp fiber product and fiber and decrypted the obtained bamboo pulp fiber. When the decryption is performed, the type and the content of the amino acid and the type and the content of the metal element are detected according to the detection method described herein, and then the obtained metal element code is MC, the proportion code is 31, and the amino acid code is gd. And combining the codes in sequence to obtain an decryption code, and comparing the decryption code with the obtained design code to realize the anti-counterfeiting identification of the bamboo pulp fiber. The principle can be freely combined to realize the anti-counterfeiting of different requirements, and meanwhile, the principle can also be applied to the subsequent textile process.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The application of amino acid metal chelate as an anti-counterfeiting tracking agent of anti-counterfeiting bamboo pulp fiber.
2. The preparation method of the anti-counterfeiting bamboo pulp fiber is characterized by comprising the following steps:
(1) soaking the crushed bamboo pulp in an alkali solution, then performing alkalization treatment and sulfonation treatment, mixing the bamboo pulp with an ionic liquid, dissolving the bamboo pulp in the alkali solution, filtering the mixture, and aging the mixture to obtain a spinning viscose;
(2) uniformly mixing the spinning viscose with at least one amino acid metal chelate and a dispersing agent to obtain spinning solution; then, the spinning solution is soaked in an acid bath for solidification and forming after spinning, and the anti-counterfeiting bamboo pulp fiber is obtained after the steps of drafting, cutting, washing, desulfurization, bleaching, oiling, dehydration and drying; wherein the total amount of the amino acid metal chelate accounts for 0.1-1 per mill of the mass fraction of the bamboo pulp.
3. The method of claim 2, wherein: in the step (1), the impregnation adopts a secondary impregnation process, wherein the primary impregnation adopts 230-235g/L NaOH, the impregnation temperature is 45-55 ℃, the secondary impregnation adopts 195-200g/L NaOH, and the impregnation temperature is 45-55 ℃.
4. The method of claim 2, wherein: in the step (1), the degree of polymerization of the bamboo pulp is 500-600, and the cellulose content is 90%.
5. The method of claim 2, wherein: in the step (1), the ionic liquid comprises one or more of 1-ethyl-3-methylimidazole acetate, 1-allyl-3-methylimidazole bromide and 1-butyl-3-methylimidazole chloride.
6. The method of claim 2, wherein: in the step (2), the amino acid metal chelate comprises one or more of calcium tryptophan, copper glycinate, manganese methionine and iron glutamate.
7. The method of claim 2, wherein: in the step (2), the dispersant is an anionic or nonionic surfactant.
8. An anti-counterfeiting bamboo pulp fiber prepared by the preparation method of any one of claims 2 to 7, which comprises bamboo pulp fiber and at least one amino acid metal chelate distributed in the bamboo pulp fiber.
9. An anti-counterfeiting method for anti-counterfeiting bamboo pulp fiber as claimed in claim 8, which is characterized by comprising the steps of encrypting, decrypting and identifying:
the encrypting step includes: according to the type and the dosage of the amino acid metal chelate, the anti-counterfeiting bamboo pulp fiber is coded to send out encryption information;
the decryption and authentication steps comprise: obtaining encrypted information, and testing the types and the use amounts of amino acid and metal ions in the bamboo pulp fiber; then comparing with the obtained encrypted information to identify the authenticity of the bamboo pulp fiber.
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